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Finding the Fourth Proportional to 192,720.80, 289,009.28 and 66,325.68

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Solution

The fourth proportional to 192,720.80, 289,009.28 and 66,325.68 is: 99,463.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,720.80 : 289,009.28 = 66,325.68 : x
  2. Step 2: Convert to fraction form
    192,720.80/289,009.28 = 66,325.68/x
  3. Step 3: Cross multiply
    192,720.80x = 289,009.28 × 66,325.68
  4. Step 4: Simplify right side
    192,720.80x = 19,168,737,022.31
  5. Step 5: Solve for x
    x = 19,168,737,022.31/192,720.80
  6. Step 6: Final answer
    x = 99,463.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.